Frequently this pressure is 0.25 inches of h2o column, but is often lifted or decreased as the procedure needs. Isolators have to be periodically leak tested to be certain their integrity and forestall escape from the decontamination agent. Leak testing can be achieved by several methods like stress decay https://www.tailinscitech.com/hpapi-containment-balancing-safety-efficiency-in-oeb-5-era/